/*!	 warp.h
**	 Header file for implementation of the "Warp" layer
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2012-2013 Carlos López
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
** === N O T E S ===========================================================
**
** ========================================================================= */

#ifndef __SYNFIG_WARP_H
#define __SYNFIG_WARP_H

#include <synfig/vector.h>
#include <synfig/angle.h>
#include <synfig/layer.h>
#include <synfig/rect.h>

namespace synfig
{
namespace modules
{
namespace lyr_std
{

class Warp_Trans;

class Warp : public Layer
{
    SYNFIG_LAYER_MODULE_EXT
    friend class Warp_Trans;
private:
    // Parameters: (Point)
    ValueBase param_src_tl;
    ValueBase param_src_br;
    ValueBase param_dest_tl;
    ValueBase param_dest_tr;
    ValueBase param_dest_bl;
    ValueBase param_dest_br;
    // Parameter: (Real)
    ValueBase param_horizon;
    // Parameter: (bool)
    ValueBase param_clip;

    // Real cache_a,cache_b,cache_c,cache_d,cache_e,cache_f,cache_i,cache_j;

    Real matrix[3][3];
    Real inv_matrix[3][3];

    Point transform_forward(const Point& p)const;
    Point transform_backward(const Point& p)const;

    Real transform_forward_z(const Point& p)const;
    Real transform_backward_z(const Point& p)const;

public:
    void sync();

    Warp();
    ~Warp();

    virtual Rect get_full_bounding_rect(Context context)const;
    virtual Rect get_bounding_rect()const;

    virtual bool set_param(const String & param, const ValueBase &value);
    virtual ValueBase get_param(const String & param)const;
    virtual Color get_color(Context context, const Point &pos)const;
    virtual bool accelerated_render(Context context, Surface *surface, int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
    virtual bool accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
    Layer::Handle hit_check(Context context, const Point &point)const;
    virtual Vocab get_param_vocab()const;
    virtual etl::handle<Transform> get_transform()const;

protected:
    virtual RendDesc get_sub_renddesc_vfunc(const RendDesc &renddesc) const;
};

}; // END of namespace lyr_std
}; // END of namespace modules
}; // END of namespace synfig

#endif